Reuters: President-elect Barack Obama will not attend United Nations talks in Poland next month working on a new treaty for fighting global warming, the U.N. Climate Change Secretariat said on Monday. “There is not going to be an Obama delegation in Poznan,” Yvo de Boer, head of the Secretariat, told a news conference in Germany that was also shown on the Internet. The 190-nation talks will be held from December 1-12 in the Polish city of Poznan. “There is one president at a time,” he …